Hi @ChetanRaj0428,
One thing I would recommend trying first is using Angular’s CDK Virtual Scroll feature. We are moving to preferring framework-specific solutions to virtual scroll over our own ion-virtual-scroll.
We are working on docs for this feature, but I would suggest taking a look at this doc for how you would use it in Ionic: https://github.com/ionic-team/ionic-docs/pull/1406/files#diff-fc5f44d3f4d707327b9a6732614d265953c7871e05403c01a81b4498e3d1105c
And then take a look at the Angular CDK docs for more info: https://material.angular.io/cdk/scrolling/overview
Please give that a try and let us know if that improves things for you. CDK Virtual Scroll is a higher performance component that ties more deeply into Angular than our component.